Mesa Laboratories
MLAB · NASDAQ
$125.16+$1.86 (+1.50%)TodayMarket closed ·
Prev close $123.30
Who owns MLAB
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 41.5% of MLAB’s shares.
- Long Path Partners, LP8.5%
- BlackRock Institutional Trust Company, N.A.6.7%
- Boston Partners4.7%
- Vanguard Capital Management, LLC4.2%
- Next 6 largest institutions17.3%
- All other shareholders58.5%
| Holder | Shares | % of shares |
|---|---|---|
| Long Path Partners, LP | 477.13K | 8.52% |
| BlackRock Institutional Trust Company, N.A. | 373.97K | 6.68% |
| Boston Partners | 265.15K | 4.73% |
| Vanguard Capital Management, LLC | 237.46K | 4.24% |
| AQR Capital Management, LLC | 203.74K | 3.64% |
| Ranger Investment Management, L.P. | 173.99K | 3.11% |
| Diamond Hill Capital Management Inc. | 155.77K | 2.78% |
| Dimensional Fund Advisors, L.P. | 148.40K | 2.65% |
| Owens (Gary M) | 148.26K | 2.65% |
| Geode Capital Management, L.L.C. | 139.68K | 2.49% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 168.51K | 3.01% |
| iShares Russell 2000 ETF | 138.28K | 2.47% |
| Diamond Hill Small Cap Fund | 114.05K | 2.04% |
| Column Small Cap Select Fund | 89.61K | 1.60% |
| Fidelity Enhanced Small Cap Core ETF | 79.13K | 1.41% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $902.41K (2 trades) and sold $1.44M (5 trades) of MLAB on the open market.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Ladiwala Shiraz Shabanali | Award | 2.51K | — |
| Hall Shannon | Award | 1.77K | — |
| Capone Mark Christopher | Award | 2.42K | — |
| Tripeny R Tony | Award | 1.77K | — |
| Sullivan John James | Award | 1.77K | — |
| Alltoft Jennifer Sadie | Option exercise | 2.78K | — |
| Alltoft Jennifer Sadie | Option exercise | 2.78K | — |
| Ladiwala Shiraz Shabanali | Option exercise | 3.81K | — |
| Ladiwala Shiraz Shabanali | Option exercise | 3.81K | — |
| Hall Shannon | Option exercise | 2.78K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 447.05K
- Days to cover
- 3.70
- % of shares outstanding
- 7.98%
- Average daily volume
- 120.94K
- Change since last report
- +10.8%
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